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Barrier-free patterned paper sensors for multiplexed heavy metal detection.
- Source :
-
Talanta . May2019, Vol. 196, p408-414. 7p. - Publication Year :
- 2019
-
Abstract
- Abstract Patterned paper sensors such as letter- and barcode-shaped sensors have become a subject of growing interest due to the potential in information embedding and data interpretation, which brings a requirement on easily fabricating these paper-based analytical devices. The answer, in part, may lie in the influence of paper structure on the performance of paper-based analytical devices. After investigating the effect of physical properties of paper on precipitation and non-precipitation assays for detecting Fe(II), here we propose a simple and promising approach for barrier-free paper patterning. Without building hydrophobic boundaries, the precipitates of sensing reactions on low-bulk and medium-thick paper substrates allow patterned signal readout directly. As a proof of concept, barrier-free patterned paper sensors for detecting heavy metals were fabricated, with detection limits of 0.25 ppm for Fe(II), 0.4 ppm for Ni(II), and 0.5 ppm for Cu(II). Our work provides a valuable perspective on fabrication of patterned paper sensors. Graphical abstract fx1 Highlights • Skipping the hydrophobic treatment in fabrication of patterned paper sensors. • Providing a versatile platform for facile preparation of patterned paper sensors. • Low-bulk and medium-thick paper substrate holds the key to barrier-free fabrication. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00399140
- Volume :
- 196
- Database :
- Academic Search Index
- Journal :
- Talanta
- Publication Type :
- Academic Journal
- Accession number :
- 134252807
- Full Text :
- https://doi.org/10.1016/j.talanta.2018.12.096